单句改错。

1. my name is betty and i'm from america.

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2. these are my friends.

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3. she can't play basketball.

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4. She is american and she's a secretary in china.

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5. these american teachers can speak chinese.

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工作票编号应连续且唯一，由许可单位按工作票种类和顺序编号。编号应包含变电站、调度等特指字、年、月和（）三部分。